THAXTER. — MONOGRAPH OF THE LABOtTLBENlAC I.E. 31 3 
myself being the same. Those on Euampripoda HyrUi Kol. belong t<> . I . Eueamptipodm, on. ■ .if the spc.-i- 
mens here referred to being the same examined by myself in the Berlin Museum. The other hosts D u- 
tioned, which .are European and may be assumed to have been infested by .1. Nyderibm at lc;i in ionic 
Ny 
/< 
• • 
mpo il)lc thai two sjmm i<- may 
have been confused here. The hosts are all wingless parasites of bat- and do not appear to I very 
commonly infested. I have myself examined the Nycteribidie in the British Museum and in (lie Mu urns 
at Berlin and Florence, as well as such scanty material as has been available in this country, but, with the 
exception of the forms referred to seen at Berlin, no parasites were discovered. 
Artiihorhynchus Nycterirle (Peyritsch) Thaxter, Plate XLYI11. figs. 7-1<>. 
Thaxter, Proc. Am. Acad. Arts and Set, Vol. XXX VI, p. 408 March, 1901. 
Although the specimens obtained in the Berlin Museum from species of Nyderibia (X. From nfeldii 
Kol., No. 922 and N. Ilermani Leabl., No. 856, both presumably from Europe) do not correspond in 
all details with the figures given by Peyritsch, especially as regards the conformation of the [writlx-chun, 
it can hardly be doubted that they belong to the present species, the long free stalk-nil of il append: 
being a character which is quite peculiar. The tip of the perithelium is foitr-lobe.l. the lobes short and 
broad, like those of A. Encamps ipodoe; but are in turn conspicuously three-lobe*!. Reference has pre- 
viously been made under the genus to Dr. Speiser's notes in regard to h< ts of this species. 
Arthrorhynchus Cyclopodi.i: Thaxter. Plate Xf.YIII, figs. 1 (\. 
Proc. Am. Acad. Arts and Set, Vol. XXXVI, p. 407. March, 1901. 
Becoming tinged with brownish yellow except the hyaline stalk-cell of the perithecium. Perithi ium 
nearly straight and symmetrical, slightly inflated, usually distinctly constricted in the region of it -ry 
small basal cells just above the very large hyaline stalk-cell, which may nearly equal it in length and 
diameter and is often somewhat enlarged distally: the venter comprising the lower iwo-thirds. not clearly 
distinguishable from the neck, which tapers slightly and almost symmetrically, the tip fairly well di 
tinguished above a more or less distinct enlargement, from which it is separated by a slight constriction 
the apex consisting of a crown of four nearly symmetrical, distinctly tridentate, erect, or very slightl; 
divergent projections, which are subtended by a corresponding number of slight elevations, the middle 
lobe of each projection more prominent than the lateral and like them bluntly rounded. Receptacle 
consisting of two small cells, the lower twice as large as the upper, which gives rise di tally to the stalk- 
lly; the foot an unmodified cell which penetrates the host, dividing 
below into a very copiously branched system of slender, sinuous, rhizoidal hyphae. Append consist- 
ing of a dumb-bell-shaped, free stalk-cell, the basal half-rounded or flattened, brownish, somewhat large. 
than the distal portion, which is deeper brown, flattened and inflated, connected by a narrow hyaline 
isthmus (the lumen of which may become almost obliterated) with the lower half, and mostly broader 
than the base of the basal cell of the appendage, which is infertile, subrcctangular, or somewhat inflated, 
slightly longer than broad, the lower half of the walls becoming conspicuously modified by a prog* ■* 
thickening from above downward, the thickened portion deeper brown ; the remaining cells of the append- 
age three to four in number, brownish, successively smaller from below upward, giving the organ a 
characteristically tapering habit; the two lowest of these cells usually relatively shorter, and bearing 
each three to four antheridia side by side, distally and externally; those above relatively longer and nar- 
rower and producing fewer antheridia, the terminal one spiniferous. Antheridia With slender curved 
necks. Snores 60-65 X 4.5 a. Perithecium: venter 325-350 X 70-90 ,t; the stalfceell 220-LoO X ,75- 
80 ft. Appendage, 100-110 p. 
55-75 X 45-50 
35-40 X 30-35 a (the upper half X 21 30 
On the abdomen of Cyclopedia macrura Speiser. New Pomerania. Berlin Museum, No, 854, 
(Dr. Dahl). 
